Add Linux build configuration and package metadata

package.json

@@ -3,6 +3,11 @@
   "private": true,
   "version": "0.2.2",
   "description": "Desktop client for Nextcloud Notes built with Electron, React, and TypeScript.",
+  "homepage": "https://gitea.davidrelich.com/davidrelich/nextcloud-notes-desktop-app",
+  "author": {
+    "name": "drelich",
+    "email": "david.relich@me.com"
+  },
   "type": "module",
   "main": "electron/main.cjs",
   "scripts": {
@@ -14,6 +19,7 @@
     "desktop": "electron .",
     "dist:dir": "npm run build && electron-builder --dir",
     "dist:mac": "npm run build && electron-builder --mac dmg zip",
+    "dist:linux": "npm run build && electron-builder --linux AppImage deb",
     "preview": "vite preview",
     "tauri": "tauri"
   },
@@ -81,7 +87,9 @@
       ]
     },
     "linux": {
-      "icon": "src-tauri/icons/icon.png",
+      "icon": "src-tauri/icons/128x128@2x.png",
+      "category": "Office",
+      "maintainer": "drelich <david.relich@me.com>",
       "target": [
         "AppImage",
         "deb"